Crom is an almighty LIGHT Psychic deck and Final Boss of the First Generation, revolving about Synchro Summoning through an organized manner, absolutely Every Single Monster on the theme is a Tuner monster, including the Synchro, so they need to generate Non-Tuners for a Synchro Summon. They have powerful effects to generate the requirements, and a plethora of protective effects to commit that objective.

Crom's main effects apart from generating materials range from heavy offensive effects, major protection, and the odd but still dangerous ability to scout your opponent's cards and stop them, they can play around their opponents while lying nearly untouchable, they are very intimidating and powerful, and will ensure you have a nightmare, as your options become less and less useful the more you play, rendering you hopeless in a struggle you won't make it out of.

Crom is not the fastest deck, it requires to assemble it's cards to create nigh-invulnerable monsters, they may fall prey to decks that can commit to their field faster than they can, they also are Special Summon reliant to a heavy extent, and they need to secure their plays for them to secure themselves later. You must not have any hesitations while facing Crom, for it'll use your fears against you, it'll use it's might to make you feel powerless, the big hurdle to leap through is the delusion of invincibility the deck projects on you, then it's actually defeating the undefeatable.

Crom Prime MastermindLIGHT★★★★[Psychic/Tuner/Effect]You cannot Special Summon Monsters from your Extra Deck, except "Crom" Monsters. If this card is Summoned: You can Set 1 "Crom" Spell/Trap directly from your Hand, Deck or GY. Each time a "Crom" Spell/Trap activates, And each time a Monster is sent from the field to your opponent's GY: Special Summon 1 Crom Token (LIGHt/Level 2/Psychic/ATK 1000/DEF 1000).ATK/1900 DEF/2000

Crom Second ContactLIGHT★★★★[Psychic/Tuner/Effect]You cannot Special Summon Monsters from your Extra Deck, except "Crom" Monsters. During the turn this card is successfully Summoned, and until your next turn, you can activate "Crom" Spells and Traps from your hand. Each time a "Crom" Spell/Trap activates, And each time a non-Token Monster attacks: Special Summon 1 Crom Token (LIGHt/Level 2/Psychic/ATK 1000/DEF 1000).ATK/1900 DEF/900

Crom Third VisionLIGHT★★[Psychic/Tuner/Effect]You cannot Special Summon Monsters from your Extra Deck, except "Crom" Monsters. If this card is Summoned: You can add 1 "Crom" card from your Deck to your Hand. Each time a "Crom" or opponent Spell/Trap activates: Special Summon 1 Crom Token (LIGHt/Level 2/Psychic/ATK 1000/DEF 1000).ATK/1300 DEF/1300

Crom QuaddissonanceLIGHT★★[Psychic/Tuner/Effect]You cannot Special Summon Monsters from your Extra Deck or activate Spells/Traps, except "Crom" cards . If this card is Summoned: You can target up to 3 "Crom" cards in your GY; Shuffle them into the Deck, then Draw 1 card for each. Each time a "Crom" Spell/Trap activates, And each time your opponent Summons a Monster: Special Summon 1 Crom Token (LIGHt/Level 2/Psychic/ATK 1000/DEF 1000).ATK/1150 DEF/2000

Nicrom - Mind StrikerLIGHT★★★★★★★★★★[Psychic/Synchro/Tuner/Effect]1 Tuner + 2+ non-tunersYou cannot Special Summon Monsters, except "Crom" Monsters. Unaffected by card effects during your turn, except your "Crom" Cards. If it attacks, the effects of all your opponent's cards will be negated until the end of the Damage Step. If this Synchro Summoned card leaves the field by an opponent's card (by battle of by effect): Target 1 other Tuner Monster in your GY; Special Summon it.ATK/3500 DEF/1000

Nicrom - Grand VisionLIGHT★★★★★★★★[Psychic/Synchro/Tuner/Effect]1 "Crom" Tuner + 1+ non-tuner monstersYou cannot Special Summon Monsters, except "Crom" Monsters. Unaffected by card effects during the Main Phase, except your "Crom" cards. Once per turn (Quick Effect): You can declare 1 card kind (Monster, Spell or Trap), your opponent may reveal 1 card from their hand, if it is of the declared kind, shuffle it into their Deck. If this Synchro Summoned card leaves the field by an opponent's card (by battle of by effect): Target 1 other LIGHT Psychic Monster in either's GY; Special Summon it.ATK/2800 DEF/2800

Omnicrom - Ultimate MastermindLIGHT★★★★★★★★★★★★★[Psychic/Synchro/Tuner/Effect]1 "Crom" Tuner + 1 Non-tuners Must be Synchro Summoned. If this card is Synchro Summoned, target a number of "Crom's Halo" cards in your GY, up to the number of non-tuners used for its Summon; Equip them to this card. When another card or effect activates (Quick Effect): Until the end of this phase, this card becomes Unaffected by card effects, except "Einherjar" cards. If this Synchro Summoned card leaves the field; target 1 Synchro Monster in either's GY; Special Summon it.

ATK/3500 DEF/3000

Crom's Circle of AndavarSpell/FieldThe Summon of "Crom" Monsters cannot be negated, also when they're summoned, cards and effects cannot be activated, If you control a Token, non-Token "Crom" cards cannot be targeted for attacks or by effects. Once per turn (Quick Effect): You can, Immediately after this effect resolves; perform the Synchro Summon of 1 "Crom" Synchro Monster.

Crom's Halo of NifbelungeSpell/Quick-playReveal 1 random card from your opponent's Hand, and if you do, add 1 "Crom" Monster from your Deck to your Hand. If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster. A Monster equipped with this card gains the following effect, you can only use this preceeding effect of "Crom Halo of Nifbelunge" once per turn:● (Quick Effect): You can declare 1 card name, if your opponent has 1 card among those in their field or hand, they may banish it, if they chose not to, send 1 "Crom" card from your Deck to the or GY.

Crom's Halo of MegingelosSpell/Quick-playAll "Crom" Tokens this turn will gain 2000 ATK but your opponent takes no damage from battles involving them. in If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster. A Monster equipped with this card gets the following effects:● Gains 500 ATK for each card equipped to it.● If it Destroys an opponent's Monster by battle: Equip that Monster to this card instead of sending it to the GY.

Crom's Halo of TarnhelmeSpell/Quick-PlayTarget 1 Set card on the field; reveal it and if you do, return it to the hand, cards and effects cannot be activated in response to this effect. If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster, it gains the following effect, you can only use the preceeding effects of "Crom 's Halo of Tarnhelme" once per turn:● You can declare 1 card name at the start of your opponent's Draw Phase before they draw, if your opponent has the declared card in their hand, they can choose to skip their Draw, or discard one of those.

Crom's Halo of SkaldskaprSpell/If you control a Tuner Monster, Draw 1 card. If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster, You can declare 1 card name, and make your opponent select one of the following effects, you can only use this effect of "Crom's Halo of Scaldskapr" once per turn:● Your opponent Tributes 1 card from their Field or Hand, except a card of the declared Name.● Your opponent reveals 3 cards from their hand, except the declared card.● Your opponent sets 1 card of the declared name directly from their Hand or Deck.

Crom's Halo of HelskorSpell/Quick-playTarget 1 "Crom" Monster you control and 1 opponent's Monster; Banish them until the End Phase. If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster. a Monster equipped with this card gets the following effects, you can only use this preceeding effect of "Crom's Halo of Helskor" once per turn:● Cannot be Targeted by opponent card effects.● Declare 1 card name, your opponent can reveal a card with that name or their entire Hand, if the declared card was in their Hand, this card can attack directly this turn.

Crom's Halo of DraupnirTrap/Special Summon 1 Nicrom Token (LIGHT/Level 4/Psychic/ATK 2000/DEF 0). If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster. A Monster equipped with this card gets the following effect, you can only use this preceeding effect of "Crom's Halo of Draupnir" once per phase:● If you activate a "Crom" card effect that includes Declaring a card name: Special Summon 1 Crom Token(LIGHT/Level 2/Psychic/ATK 1000/DEF 1000)

Crom's Halo of SingasteinTrap/If you control a "Crom" Monster: Target 1 Monster your opponent controls; It cannot be Tributed or used as Material. If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster. a Monster equipped with this card gets the following effect, you can only use this preceeding effect of "Crom's Halo of Singastein" once per turn:● (Quick Effect): You can declare 1 card name, your opponent cannot use Monsters of the declared name as Tribute or as Material for a Summon this turn.

Crom's Halo of BrisingamenTrap/"Crom" cards you control cannot be Destroyed by card effects this turn. If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster. A Monster equipped with this card gets the following effect, you can only use this preceeding effect of "Crom's Halo of Brisingamen" once per turn:● Once per turn (Quick Effect): You can declare 2 card names; this card becomes unaffected by effects from cards with those names.

Judgment of OmnicromTrap Card/CounterWhen a card or effect is activated while you control "Omnicrom the Mastermind", negate the activation and if you do, Banish it face-down. If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Synchro Monster, it gains the following effect, you can only use this preceeding effect of "Crom " once per turn:● You can declare 2 card names, the equipped Monster can attack Monsters with the declared name in addition to its attack once each.

Crom Token LIGHT★★[Psychic/Token]Can be Summoned by the effect of a "Crom" card.ATK/1000 DEF/1000

Nicrom TokenLIGHT★★★★[Psychic/Token]Can be Summoned by the effect of "Crom's Halo of Draupnir".ATK/2000 DEF/0

Omicrom's Light of SupremacyTrap Card/NormalSpecial Summon as many "Crom" tokens as possible (Max 4), but you cannot summon Monsters the turn you use this effect, except "Crom" Monsters. If this card is in the GY; You can Tribute 2 Crom Token you control; Equip this card to a "Crom" Tuner Monster. A Monster equipped with this card gets the following effects:● Cannot be Tributed, Banished, Destroyed by battle or used as Material for a summon.● At the start of each turn: You can declare 1 card name (or 3 during your turn).● Your opponent cannot Summon or Activate cards whose name has been declared by "Crom" card effects this turn, except "Einherjar" cards.

Dicrom's Halo of Einherjars - GramSpell/Quick-playTarget 1 "Crom" or "Einherjar" Monster in your GY; special Summon it and 1 Crom Token (LIGHT/Level 2/Psychic/ATK 1000/DEF 1000). If this card is in the GY; You can Tribute 1 Crom Token you control; Equip this card to a "Crom" Tuner Monster. a Monster equipped with this card gets the following effectsl:● It's level is increased by 1● You can target 1 card in either's GY whose name was revealed by a "Crom" card effect; Special Summon it in Defense position, this preceeding effect of "Dicrom's Halo of Einherjars - Gram" can only be used once per Duel.

Dicrom Einherjar - ZeroplasmaLIGHT★★★★★★★★★[Psychic/Synchro/Tuner/Effect]1 Tuner + 1+ non-Tuner monstersNon-Tuner Monsters you control become unaffected by opponent cards during their turn. Once per turn (Quick Effect): You can target 1 Monster on the field whose name was declared by a "Crom" card effect; That Monster's effects on the field are negated, also replace this effect with that Monster's effects on the field. If this Synchro Summoned card leaves the field: You can target 1 Monster in your GY; Special Summon it.ATK/2600 DEF/2500